1. A and B together can do a job in 6 days. B alone can finish it in 10 days. In how many days can A alone finish the work?

(a) 15 days
(b) 20 days
(c) 24 days
(d) Cannot be determined
(e) None of these

2. A is 25% more efficient than B and takes 2 days less than B to complete a certain work. Then what time will be taken by both of them working together?

3. 24 men working 8 hours a day can finish a work in 10 days. Find the number of men required to finish the same work in 6 days working 5 hours a day?
(a) 60
(b) 64
(c) 80
(d) 72
(e) None of these

4. A machine A can print one thousand books in 10 hours, machine B can print the same number of books in 12 hours while machine C print them in 15 hours. All the machines are started at 9 a.m. while machine A is closed at 11 a.m. and the remaining two machines complete the work. Approximately at what time will the work be finished?
(a) 11:30 a.m.
(b) 12 noon
(c)  12:30 pm
(d) 2:20 pm
(e) None of these

5. The work done by a man, a woman and a child is in the ratio of 3 : 2 : 1. There are 20 men, 30 women and 48 children in a factory. Their weekly wages amount to Rs 840, which is divided in the ratio of work done by the men, women and children. What will be the wages of 15 men, 21 women and 30 children for 2 weeks?
(a) Rs 585
(b) Rs 292.5
(c) Rs 1170
(d) Rs 900
(e) None of these

6. Two pipes A and B can fill a tank in 15 and 12 hours respectively. Pipe B alone is kept open for 3/4 of time and both pipes are kept open for remaining time. In how many hours, the tank will be full?
(a) 18
(b) 10
(c)  12
(d) 13.5
(e) None of these

7. A pipe can fill a tank in 15 minutes and another one in 10 minutes. A third pipe can empty the tank in 5 minutes. The first two pipes are kept open for 4 minutes in the beginning and then the third pipe is also opened. Now in what time will the tank be emptied?
(a) 24 min
(b) 25 min
(c) 20 min
(d) 22 min
(e) None of these

8. A cistern has three pipes, A, B and C. the pipes A and B can fill it in 5 and 6 hours respectively and C can empty it in 2 hours. If the pipes A, B and C are opened in order at 2, 3 and 4 p.m. respectively, when will the cistern be empty?
(a) 8:15 p.m.
(b) 11.25 p.m.
(c)  7:15 p.m.
(d) Cannot be determined
(e) None of these

9. Bunnu, Gaffur and Ram can do a work in 10, 12 and 15 days respectively knowing that they work together and get an amount of Rs. 1500. What is the share of Gaffur in that amount?
(a) Rs 300
(b) Rs 500
(c) Rs 450
(d) Rs 400
(e) None of these

10. A B can fill a cistern in 7.5 minutes and 5 minutes respectively and C can carry off 14 litres per minute. If the cistern is already full and all the three pipes are opened, then it is emptied in 1 hour. How many litres can it hold?
(a) 20
(b) 30
(c) 80
(d) 40
(e) None of these